Okumura has long lusted after Yuna, the mother of his friend Kota. When he stays overnight at Kota's house, he drugs Yuna unconscious, strips her naked and photographs her with his phone. Days later, Yuna catches him sneaking into her room and rummaging through her underwear. Okumura uses the explicit photos to blackmail her, finally giving him free rein to molest the body he has always craved. He then takes away Yuna's bras and toys with her swaying bare breasts almost every day...